"Make Haste removes slows and provides 5 seconds immunity"
This effect should be part of the Make Haste skill by default. The set bonus should be changed to reduce the cooldown by 2-3 minutes. I think we've all had enough of having to swap between two armor sets (on top of all the other gear swaps we have to do in combat) just to remove a slow, whereas champs and guards can take right off with sprint or charge. I've even tried soloing and 1v1ing in the Perseverance set, but it just isn't worth it due to the set's lack of finesse (let me just point out that none of the healing sets for a class that uses melee healing skills have any finesse on them)
Edit: An anecdote.
I was dismounted by a p2w rank 2 reaver outside TR. A fight ensued, and when it became obvious I was going to win, he slowed me, shook off his own slow with Resilience, and ran towards the keep. I was wearing 3 Pers/3 Command, so I had to take a second to swap two Command pieces out for two Perseverance pieces, plus my swap halberd for a 45 second Make Haste duration, then I had to swap everything back to make sure I had enough Finesse to finish him off quickly.
In the time it took to do this he dropped out of combat and Charged into the keep. I chased and popped last stand, hoping to finish him off, but he just used a store brand when I slowed him, then ran off to let the NPCs finish me off. I know I could have used Threatening Shout or Noble Mark to keep him in combat before the gear swap, but my Mark skills were cd since I switched to Telling Mark when he turned his back to me, and skill lock prevented me from using Threatening Shout. I needed to shake off the slow and catch up to him straight away, but sadly I could not do that without first performing six gear swaps. A Champion or Guardian would have had no problem catching up and stunning/slowing him however, because they have something that is a melee class essential in any MMO: a skill that shakes off slows independent of any armor set bonus.
Why on Earth don't Captains have that? If common sense didn't give it to us at the start of the game, have five years of horrid soloing experiences not made it evident that we need it?